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Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack Specific topics relating to wheels and tires.


View Poll Results: What diameter wheels do I want?
17" 87 68.50%
18" 40 31.50%
Voters: 127. You may not vote on this poll

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Old 04-01-2014, 10:47 PM   #29
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Thanks @Vracer111 - corrected my post.
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Old 04-01-2014, 10:50 PM   #30
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Corrected my post. Thank you!
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Old 04-02-2014, 04:06 PM   #31
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Originally Posted by Silver Ignition View Post
Well-written and informative post. Thanks!


I think I decided...
Looking into a 17x9 +45 RPF1 with a 245/40R17


Considering a 10mm spacer out back so it's not so tucked. I'd like to keep the wheel/tire size square so they can be rotated regularly.
Just curious, why 17x9 over 17x8? If you're staying at 17" I'm assuming it's because performance is important to you. I agonized over wheel choices for a long time, and everytime I compared 9" to 8" I found that the 9" was really just too wide for the car for the amount of power we have. Seems like if you want something that still looks wide, is capable of great grip and can still be kicked out if you give it enough power, 8" is the sweet spot.

You really can't go wrong with any RPF1, though. They look incredible and weigh nothing.
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Old 04-02-2014, 04:43 PM   #32
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I run 18's and I also autocross on them. I got them because they look fucking sexy.

Anyone who claims they can notice a performance difference is living in a fantasy world, I still run the stock wheels in the winter and there is literally no difference.

Work Kiwami CR, 18x8.5 +38 front 18x9.5 +38 rear with 225/40/18 & 245/35/18 Pilot Super Sports.

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Old 04-02-2014, 05:18 PM   #33
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Quote:
Originally Posted by Wander View Post
Just curious, why 17x9 over 17x8? If you're staying at 17" I'm assuming it's because performance is important to you. I agonized over wheel choices for a long time, and everytime I compared 9" to 8" I found that the 9" was really just too wide for the car for the amount of power we have. Seems like if you want something that still looks wide, is capable of great grip and can still be kicked out if you give it enough power, 8" is the sweet spot.

You really can't go wrong with any RPF1, though. They look incredible and weigh nothing.
I'm thinking a 9" wheel because they're a better match for the 245's no? The recommended size for 8" is a 225 and I can honestly run 225's on my OE wheels. I want more contact patch. Weight should be just about the same with the RPF1's and 245's compared to the factory setup so it'll be minimally noticable I think...
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Old 04-02-2014, 11:34 PM   #34
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Originally Posted by Silver Ignition View Post
I'm thinking a 9" wheel because they're a better match for the 245's no? The recommended size for 8" is a 225 and I can honestly run 225's on my OE wheels. I want more contact patch. Weight should be just about the same with the RPF1's and 245's compared to the factory setup so it'll be minimally noticable I think...
You're 100% correct, but that happens to be the point I'm driving at -- way too much contact patch when compared to the power we put out.

Keep in mind, though, I'm not a tire scientist and really have no idea of what I'm talking about haha.
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Old 04-03-2014, 01:50 AM   #35
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Not a perfect test but it offers some insight.

http://www.caranddriver.com/features...d-tires-tested

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Old 04-03-2014, 07:14 AM   #36
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Quote:
Originally Posted by Wander View Post
You're 100% correct, but that happens to be the point I'm driving at -- way too much contact patch when compared to the power we put out.

Keep in mind, though, I'm not a tire scientist and really have no idea of what I'm talking about haha.
I don't want a bigger contact patch to handle the immense power of these N/A Boxer engine…I want a bigger contact patch to take corners at a higher speed with better grip.

Not saying you don't know what you're talking about but it's a bit like 6/half-dozen
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Old 04-03-2014, 08:05 AM   #37
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Originally Posted by OjiGeorge View Post
18's for the street, 17/16's for autox/track Your track wheels don;t need to be sexy, and there are lots of inexpensive solutions out there that are light weight and race proven (Mach V comes to mind).. and they're sexy to boot.
That's what I'm running, 18x8 Raijins on street, stock on track.
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Old 04-03-2014, 09:38 PM   #38
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Quote:
Originally Posted by f0rge View Post
I run 18's and I also autocross on them. I got them because they look fucking sexy.

Anyone who claims they can notice a performance difference is living in a fantasy world, I still run the stock wheels in the winter and there is literally no difference.

Work Kiwami CR, 18x8.5 +38 front 18x9.5 +38 rear with 225/40/18 & 245/35/18 Pilot Super Sports.
I agree 18" wheels look very nice. But there is a real difference you can feel and measure between massively different weight wheel/tire combinations - as the heavier the combination the more force is put into the suspension, the harder it is worked, and the worse the ride quality becomes. Assuming same suspension, an ~45-46lb wheel/tire combo per corner verses an ~36-37 lb wheel/tire combo per corner is a massive difference in unsprung weight and will show a noticeable change in ride quality. Stock is ~ 41lbs/corner.

Traction and cornering speeds may not be much different between the two if on similar level of tire compound and a smooth surface, but the ride quality of the car will be noticeably worse on the 45-46lb/corner set than the 36-37lb/corner set, especially the less smooth the surface is. The result in a much harsher and unsettled ride. Switch to the set that weighs ~10lbs less a corner and the ride will very noticeably smooth out and the chassis will seem to glide much easier over the surface in comparison, feeling more planted. At the same time the chassis is more responsive and playful with less mass to upset it.

I can feel a noticeable difference between stock and my nearly 5lb less a corner setup. I can also feel the slight difference between my street set and track set, street set is ~ 2lb heavier a corner.
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Last edited by Vracer111; 04-03-2014 at 10:07 PM.
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Old 04-03-2014, 09:43 PM   #39
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17's= Performance

18's= Everything else minus a little performance

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